With snow, ice, and frigid temperatures across much of the United States, many runners are probably thinking: What about my training plan?

If the cold is forcing you to skip your planned run and head indoors to the treadmill, you don’t have to totally bail on speed work. Bart Yasso, Chief Running Officer at Runner's World, says treadmills can be an effective tool for training. Here are his top three favorite treadmill workouts for indoor winter runs:

1. 10K-pace interval run: Warm up at an easy pace for 12 minutes. Then run for five minutes at your goal 10K pace. Do this five times with two minutes of recovery at an easy pace in between. Cool down for 10 minutes at an easy pace.

2. Incline workout: Warm up for 12 minutes at an easy pace. Run three minutes at your 10K goal race pace on a 2 percent incline. Run for two minutes at recovery pace and repeat the intervals eight times. Cool down for 12 minutes.

3. Half marathon pace workout: Warm up for 12 minutes at an easy pace. Then, run for 10 minutes at half marathon race pace on a 1 percent incline. Recover for 3 minutes and then repeat three more times. Cool down for 12 minutes at an easy pace.

Bart also has some tips for tackling a long run on the treadmill. “A long run on the treadmill is a perfect time to teach your body to run negative splits,” he says.

Bart suggests breaking up a long run into four segments. For example, on a 16-mile long run, run miles 1-4 at 2 minutes slower than your goal marathon pace. For miles 5-8 run 90 seconds slower than marathon pace, miles 9-12 run one minute slower than marathon pace, and finish with miles 13-16 at 30 seconds slower than marathon pace.